251550204055 has 8 divisors (see below), whose sum is σ = 302772211344. Its totient is φ = 200632185600.

The previous prime is 251550204011. The next prime is 251550204067. The reversal of 251550204055 is 550402055152.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 251550204055 - 2³³ = 242960269463 is a prime.

It is a super-2 number, since 2×251550204055² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 251550204055.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 75995386 + ... + 75998695.

It is an arithmetic number, because the mean of its divisors is an integer number (37846526418).

Almost surely, 2^251550204055 is an apocalyptic number.

251550204055 is a deficient number, since it is larger than the sum of its proper divisors (51222007289).

251550204055 is a wasteful number, since it uses less digits than its factorization.

251550204055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151994417.

The product of its (nonzero) digits is 50000, while the sum is 34.

The spelling of 251550204055 in words is "two hundred fifty-one billion, five hundred fifty million, two hundred four thousand, fifty-five".